Page 249 - Photonics Essentials an introduction with experiments

Measurements in Photonics

Measurements in Photonics 243

nate the screen behind the slit. You are free to place the lens
wherever you wish. For simplicity, consider this to be a one-di-
mensional problem. Show, using diagrams, how much of the
screen is illuminated when the lens is
(a) f/2
(b) f/4
(c) f/8
What is the f-number that exactly fills the screen?

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